Alloy Pipe,Pipe for chemical fertilizer facility ,Marine Pipe,Casing Pipe,Drill Pipe,Oil Pipe,Structure Pipe ,Pipe of Pipelines Code NO.VarietyNormal ... Tube20,35,45,27SiMnGB/T173969American Standard PipeA,BASTM A106 ASTM A5310Casing and TubingJ55,K55,N80,L80,T95, ... varieties include: Low/medium pressure boiler pipe, high pressure boiler pipe, alloy pipe, marine pipe, hollow sucker rod, oil cracking ...